﻿/*!
 * jQuery Color Animations v@VERSION
 * https://github.com/jquery/jquery-color
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * Date: @DATE
 */

(function (root, factory) {
    if (typeof define === "function" && define.amd) {

        // AMD. Register as an anonymous module.
        define(["jquery"], factory);
    } else if (typeof exports === "object") {
        module.exports = factory(require("jquery"));
    } else {
        factory(root.jQuery);
    }
})(this, function (jQuery, undefined) {

    var stepHooks = "backgroundColor borderBottomColor borderLeftColor borderRightColor " +
		"borderTopColor color columnRuleColor outlineColor textDecorationColor textEmphasisColor",

	class2type = {},
	toString = class2type.toString,

	// plusequals test for += 100 -= 100
	rplusequals = /^([\-+])=\s*(\d+\.?\d*)/,

	// a set of RE's that can match strings and generate color tuples.
	stringParsers = [{
	    re: /rgba?\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
	    parse: function (execResult) {
	        return [
                execResult[1],
                execResult[2],
                execResult[3],
                execResult[4]
	        ];
	    }
	}, {
	    re: /rgba?\(\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
	    parse: function (execResult) {
	        return [
                execResult[1] * 2.55,
                execResult[2] * 2.55,
                execResult[3] * 2.55,
                execResult[4]
	        ];
	    }
	}, {

	    // this regex ignores A-F because it's compared against an already lowercased string
	    re: /#([a-f0-9]{2})([a-f0-9]{2})([a-f0-9]{2})/,
	    parse: function (execResult) {
	        return [
                parseInt(execResult[1], 16),
                parseInt(execResult[2], 16),
                parseInt(execResult[3], 16)
	        ];
	    }
	}, {

	    // this regex ignores A-F because it's compared against an already lowercased string
	    re: /#([a-f0-9])([a-f0-9])([a-f0-9])/,
	    parse: function (execResult) {
	        return [
                parseInt(execResult[1] + execResult[1], 16),
                parseInt(execResult[2] + execResult[2], 16),
                parseInt(execResult[3] + execResult[3], 16)
	        ];
	    }
	}, {
	    re: /hsla?\(\s*(\d+(?:\.\d+)?)\s*,\s*(\d+(?:\.\d+)?)\%\s*,\s*(\d+(?:\.\d+)?)\%\s*(?:,\s*(\d?(?:\.\d+)?)\s*)?\)/,
	    space: "hsla",
	    parse: function (execResult) {
	        return [
                execResult[1],
                execResult[2] / 100,
                execResult[3] / 100,
                execResult[4]
	        ];
	    }
	}],

	// jQuery.Color( )
	color = jQuery.Color = function (color, green, blue, alpha) {
	    return new jQuery.Color.fn.parse(color, green, blue, alpha);
	},
	spaces = {
	    rgba: {
	        props: {
	            red: {
	                idx: 0,
	                type: "byte"
	            },
	            green: {
	                idx: 1,
	                type: "byte"
	            },
	            blue: {
	                idx: 2,
	                type: "byte"
	            }
	        }
	    },

	    hsla: {
	        props: {
	            hue: {
	                idx: 0,
	                type: "degrees"
	            },
	            saturation: {
	                idx: 1,
	                type: "percent"
	            },
	            lightness: {
	                idx: 2,
	                type: "percent"
	            }
	        }
	    }
	},
	propTypes = {
	    "byte": {
	        floor: true,
	        max: 255
	    },
	    "percent": {
	        max: 1
	    },
	    "degrees": {
	        mod: 360,
	        floor: true
	    }
	},

	// colors = jQuery.Color.names
	colors,

	// local aliases of functions called often
	each = jQuery.each;

    // define cache name and alpha properties
    // for rgba and hsla spaces
    each(spaces, function (spaceName, space) {
        space.cache = "_" + spaceName;
        space.props.alpha = {
            idx: 3,
            type: "percent",
            def: 1
        };
    });

    // Populate the class2type map
    jQuery.each("Boolean Number String Function Array Date RegExp Object Error Symbol".split(" "),
        function (i, name) {
            class2type["[object " + name + "]"] = name.toLowerCase();
        });

    function getType(obj) {
        if (obj == null) {
            return obj + "";
        }

        return typeof obj === "object" ?
            class2type[toString.call(obj)] || "object" :
            typeof obj;
    }

    function clamp(value, prop, allowEmpty) {
        var type = propTypes[prop.type] || {};

        if (value == null) {
            return (allowEmpty || !prop.def) ? null : prop.def;
        }

        // ~~ is an short way of doing floor for positive numbers
        value = type.floor ? ~~value : parseFloat(value);

        if (type.mod) {

            // we add mod before modding to make sure that negatives values
            // get converted properly: -10 -> 350
            return (value + type.mod) % type.mod;
        }

        // for now all property types without mod have min and max
        return Math.min(type.max, Math.max(0, value));
    }

    function stringParse(string) {
        var inst = color(),
            rgba = inst._rgba = [];

        string = string.toLowerCase();

        each(stringParsers, function (i, parser) {
            var parsed,
                match = parser.re.exec(string),
                values = match && parser.parse(match),
                spaceName = parser.space || "rgba";

            if (values) {
                parsed = inst[spaceName](values);

                // if this was an rgba parse the assignment might happen twice
                // oh well....
                inst[spaces[spaceName].cache] = parsed[spaces[spaceName].cache];
                rgba = inst._rgba = parsed._rgba;

                // exit each( stringParsers ) here because we matched
                return false;
            }
        });

        // Found a stringParser that handled it
        if (rgba.length) {

            // if this came from a parsed string, force "transparent" when alpha is 0
            // chrome, (and maybe others) return "transparent" as rgba(0,0,0,0)
            if (rgba.join() === "0,0,0,0") {
                jQuery.extend(rgba, colors.transparent);
            }
            return inst;
        }

        // named colors
        return colors[string];
    }

    color.fn = jQuery.extend(color.prototype, {
        parse: function (red, green, blue, alpha) {
            if (red === undefined) {
                this._rgba = [null, null, null, null];
                return this;
            }
            if (red.jquery || red.nodeType) {
                red = jQuery(red).css(green);
                green = undefined;
            }

            var inst = this,
                type = getType(red),
                rgba = this._rgba = [];

            // more than 1 argument specified - assume ( red, green, blue, alpha )
            if (green !== undefined) {
                red = [red, green, blue, alpha];
                type = "array";
            }

            if (type === "string") {
                return this.parse(stringParse(red) || colors._default);
            }

            if (type === "array") {
                each(spaces.rgba.props, function (key, prop) {
                    rgba[prop.idx] = clamp(red[prop.idx], prop);
                });
                return this;
            }

            if (type === "object") {
                if (red instanceof color) {
                    each(spaces, function (spaceName, space) {
                        if (red[space.cache]) {
                            inst[space.cache] = red[space.cache].slice();
                        }
                    });
                } else {
                    each(spaces, function (spaceName, space) {
                        var cache = space.cache;
                        each(space.props, function (key, prop) {

                            // if the cache doesn't exist, and we know how to convert
                            if (!inst[cache] && space.to) {

                                // if the value was null, we don't need to copy it
                                // if the key was alpha, we don't need to copy it either
                                if (key === "alpha" || red[key] == null) {
                                    return;
                                }
                                inst[cache] = space.to(inst._rgba);
                            }

                            // this is the only case where we allow nulls for ALL properties.
                            // call clamp with alwaysAllowEmpty
                            inst[cache][prop.idx] = clamp(red[key], prop, true);
                        });

                        // everything defined but alpha?
                        if (inst[cache] && jQuery.inArray(null, inst[cache].slice(0, 3)) < 0) {

                            // use the default of 1
                            if (inst[cache][3] == null) {
                                inst[cache][3] = 1;
                            }

                            if (space.from) {
                                inst._rgba = space.from(inst[cache]);
                            }
                        }
                    });
                }
                return this;
            }
        },
        is: function (compare) {
            var is = color(compare),
                same = true,
                inst = this;

            each(spaces, function (_, space) {
                var localCache,
                    isCache = is[space.cache];
                if (isCache) {
                    localCache = inst[space.cache] || space.to && space.to(inst._rgba) || [];
                    each(space.props, function (_, prop) {
                        if (isCache[prop.idx] != null) {
                            same = (isCache[prop.idx] === localCache[prop.idx]);
                            return same;
                        }
                    });
                }
                return same;
            });
            return same;
        },
        _space: function () {
            var used = [],
                inst = this;
            each(spaces, function (spaceName, space) {
                if (inst[space.cache]) {
                    used.push(spaceName);
                }
            });
            return used.pop();
        },
        transition: function (other, distance) {
            var end = color(other),
                spaceName = end._space(),
                space = spaces[spaceName],
                startColor = this.alpha() === 0 ? color("transparent") : this,
                start = startColor[space.cache] || space.to(startColor._rgba),
                result = start.slice();

            end = end[space.cache];
            each(space.props, function (key, prop) {
                var index = prop.idx,
                    startValue = start[index],
                    endValue = end[index],
                    type = propTypes[prop.type] || {};

                // if null, don't override start value
                if (endValue === null) {
                    return;
                }

                // if null - use end
                if (startValue === null) {
                    result[index] = endValue;
                } else {
                    if (type.mod) {
                        if (endValue - startValue > type.mod / 2) {
                            startValue += type.mod;
                        } else if (startValue - endValue > type.mod / 2) {
                            startValue -= type.mod;
                        }
                    }
                    result[index] = clamp((endValue - startValue) * distance + startValue, prop);
                }
            });
            return this[spaceName](result);
        },
        blend: function (opaque) {

            // if we are already opaque - return ourself
            if (this._rgba[3] === 1) {
                return this;
            }

            var rgb = this._rgba.slice(),
                a = rgb.pop(),
                blend = color(opaque)._rgba;

            return color(jQuery.map(rgb, function (v, i) {
                return (1 - a) * blend[i] + a * v;
            }));
        },
        toRgbaString: function () {
            var prefix = "rgba(",
                rgba = jQuery.map(this._rgba, function (v, i) {
                    if (v != null) {
                        return v;
                    }
                    return i > 2 ? 1 : 0;
                });

            if (rgba[3] === 1) {
                rgba.pop();
                prefix = "rgb(";
            }

            return prefix + rgba.join() + ")";
        },
        toHslaString: function () {
            var prefix = "hsla(",
                hsla = jQuery.map(this.hsla(), function (v, i) {
                    if (v == null) {
                        v = i > 2 ? 1 : 0;
                    }

                    // catch 1 and 2
                    if (i && i < 3) {
                        v = Math.round(v * 100) + "%";
                    }
                    return v;
                });

            if (hsla[3] === 1) {
                hsla.pop();
                prefix = "hsl(";
            }
            return prefix + hsla.join() + ")";
        },
        toHexString: function (includeAlpha) {
            var rgba = this._rgba.slice(),
                alpha = rgba.pop();

            if (includeAlpha) {
                rgba.push(~~(alpha * 255));
            }

            return "#" + jQuery.map(rgba, function (v) {

                // default to 0 when nulls exist
                return ("0" + (v || 0).toString(16)).substr(-2);
            }).join("");
        },
        toString: function () {
            return this._rgba[3] === 0 ? "transparent" : this.toRgbaString();
        }
    });
    color.fn.parse.prototype = color.fn;

    // hsla conversions adapted from:
    // https://code.google.com/p/maashaack/source/browse/packages/graphics/trunk/src/graphics/colors/HUE2RGB.as?r=5021

    function hue2rgb(p, q, h) {
        h = (h + 1) % 1;
        if (h * 6 < 1) {
            return p + (q - p) * h * 6;
        }
        if (h * 2 < 1) {
            return q;
        }
        if (h * 3 < 2) {
            return p + (q - p) * ((2 / 3) - h) * 6;
        }
        return p;
    }

    spaces.hsla.to = function (rgba) {
        if (rgba[0] == null || rgba[1] == null || rgba[2] == null) {
            return [null, null, null, rgba[3]];
        }
        var r = rgba[0] / 255,
            g = rgba[1] / 255,
            b = rgba[2] / 255,
            a = rgba[3],
            max = Math.max(r, g, b),
            min = Math.min(r, g, b),
            diff = max - min,
            add = max + min,
            l = add * 0.5,
            h, s;

        if (min === max) {
            h = 0;
        } else if (r === max) {
            h = (60 * (g - b) / diff) + 360;
        } else if (g === max) {
            h = (60 * (b - r) / diff) + 120;
        } else {
            h = (60 * (r - g) / diff) + 240;
        }

        // chroma (diff) == 0 means greyscale which, by definition, saturation = 0%
        // otherwise, saturation is based on the ratio of chroma (diff) to lightness (add)
        if (diff === 0) {
            s = 0;
        } else if (l <= 0.5) {
            s = diff / add;
        } else {
            s = diff / (2 - add);
        }
        return [Math.round(h) % 360, s, l, a == null ? 1 : a];
    };

    spaces.hsla.from = function (hsla) {
        if (hsla[0] == null || hsla[1] == null || hsla[2] == null) {
            return [null, null, null, hsla[3]];
        }
        var h = hsla[0] / 360,
            s = hsla[1],
            l = hsla[2],
            a = hsla[3],
            q = l <= 0.5 ? l * (1 + s) : l + s - l * s,
            p = 2 * l - q;

        return [
            Math.round(hue2rgb(p, q, h + (1 / 3)) * 255),
            Math.round(hue2rgb(p, q, h) * 255),
            Math.round(hue2rgb(p, q, h - (1 / 3)) * 255),
            a
        ];
    };


    each(spaces, function (spaceName, space) {
        var props = space.props,
            cache = space.cache,
            to = space.to,
            from = space.from;

        // makes rgba() and hsla()
        color.fn[spaceName] = function (value) {

            // generate a cache for this space if it doesn't exist
            if (to && !this[cache]) {
                this[cache] = to(this._rgba);
            }
            if (value === undefined) {
                return this[cache].slice();
            }

            var ret,
                type = getType(value),
                arr = (type === "array" || type === "object") ? value : arguments,
                local = this[cache].slice();

            each(props, function (key, prop) {
                var val = arr[type === "object" ? key : prop.idx];
                if (val == null) {
                    val = local[prop.idx];
                }
                local[prop.idx] = clamp(val, prop);
            });

            if (from) {
                ret = color(from(local));
                ret[cache] = local;
                return ret;
            } else {
                return color(local);
            }
        };

        // makes red() green() blue() alpha() hue() saturation() lightness()
        each(props, function (key, prop) {

            // alpha is included in more than one space
            if (color.fn[key]) {
                return;
            }
            color.fn[key] = function (value) {
                var local, cur, match, fn,
                    vtype = getType(value);

                if (key === "alpha") {
                    fn = this._hsla ? "hsla" : "rgba";
                } else {
                    fn = spaceName;
                }
                local = this[fn]();
                cur = local[prop.idx];

                if (vtype === "undefined") {
                    return cur;
                }

                if (vtype === "function") {
                    value = value.call(this, cur);
                    vtype = getType(value);
                }
                if (value == null && prop.empty) {
                    return this;
                }
                if (vtype === "string") {
                    match = rplusequals.exec(value);
                    if (match) {
                        value = cur + parseFloat(match[2]) * (match[1] === "+" ? 1 : -1);
                    }
                }
                local[prop.idx] = value;
                return this[fn](local);
            };
        });
    });

    // add cssHook and .fx.step function for each named hook.
    // accept a space separated string of properties
    color.hook = function (hook) {
        var hooks = hook.split(" ");
        each(hooks, function (i, hook) {
            jQuery.cssHooks[hook] = {
                set: function (elem, value) {
                    var parsed;

                    if (value !== "transparent" && (getType(value) !== "string" || (parsed = stringParse(value)))) {
                        value = color(parsed || value);
                        value = value.toRgbaString();
                    }
                    elem.style[hook] = value;
                }
            };
            jQuery.fx.step[hook] = function (fx) {
                if (!fx.colorInit) {
                    fx.start = color(fx.elem, hook);
                    fx.end = color(fx.end);
                    fx.colorInit = true;
                }
                jQuery.cssHooks[hook].set(fx.elem, fx.start.transition(fx.end, fx.pos));
            };
        });

    };

    color.hook(stepHooks);

    jQuery.cssHooks.borderColor = {
        expand: function (value) {
            var expanded = {};

            each(["Top", "Right", "Bottom", "Left"], function (i, part) {
                expanded["border" + part + "Color"] = value;
            });
            return expanded;
        }
    };

    // Basic color names only.
    // Usage of any of the other color names requires adding yourself or including
    // jquery.color.svg-names.js.
    colors = jQuery.Color.names = {

        // 4.1. Basic color keywords
        aqua: "#00ffff",
        black: "#000000",
        blue: "#0000ff",
        fuchsia: "#ff00ff",
        gray: "#808080",
        green: "#008000",
        lime: "#00ff00",
        maroon: "#800000",
        navy: "#000080",
        olive: "#808000",
        purple: "#800080",
        red: "#ff0000",
        silver: "#c0c0c0",
        teal: "#008080",
        white: "#ffffff",
        yellow: "#ffff00",

        // 4.2.3. "transparent" color keyword
        transparent: [null, null, null, 0],

        _default: "#ffffff"
    };

});